Deceleration-dependent left bundle branch block: a spectrum of bundle branch conduction delay.

The authors thank Dr. N.H.G. Holford, assistant professor of Medicine, Pharmacy and Pharmacological Chemistry, University of California, San Francisco, for his constructive review of this manuscript, and Dr. S. Lee, Director, Hematology Department, Cedars-Sinai Medical Center. In addition, we express our gratitude to Joye Nunn for secretarial assistance, to Lance Laforteza for graphics, and to Patricia Edwards for photography.